A Batteryless Thermoelectric Energy-Harvesting Interface Circuit With 35mV Startup Voltage

A batteryless thermoelectric energy-harvesting interface circuit to extract electrical energy from human body heat is implemented in a 0.35µm CMOS process. A mechanically assisted startup circuit enables operation of the system from input voltages as low as 35mV. The chip includes a control circuit that performs maximal transfer of the extracted energy to a storage capacitor and regulates the output voltage at 1.8V.